Reaktion #573778

Reaktionsgleichung

N-[4-(4-piperidinyl-carbonyl)phenyl]-acetamide

2-chloro-4'-fluoro-acetophenone

sodium bicarbonate

→

1-(4-Fluorophenyl)-2-[4-[(4-acetamidophenyl)carbonyl]-1-piperidinyl]-ethanone

Lösungsmittel

water

tetrahydrofuran

brine

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturThis mixture was heated
2. 2
   Temperaturto reflux for 1.5 hours
3. 3
   Extraktionextracted with chloroform
4. 4
   TrocknenThe organic layer was dried with magnesium sulfate
5. 5
   Filtrationfiltered
6. 6
   Einengenconcentrated
7. 7
   Sonstigeto yield a solid which
8. 8
   Sonstigewas recrystallized from 2-butanone/cyclohexane

Vorschrift

To a solution of 3.0g (12.2 mmol) of N-[4-(4-piperidinyl-carbonyl)phenyl]-acetamide in 10 ml of water and 100 ml of tetrahydrofuran was added 2.3 g (13.4 mmol) of 2-chloro-4'-fluoro-acetophenone followed by 2.0g (24.4 mmol) of sodium bicarbonate. This mixture was heated to reflux for 1.5 hours. The reaction mixture was poured into 500 ml of brine and extracted with chloroform. The organic layer was dried with magnesium sulfate, filtered and concentrated to yield a solid which was recrystallized from 2-butanone/cyclohexane. 1-(4-Fluorophenyl)-2-[4-[(4-acetamidophenyl)carbonyl]-1-piperidinyl]-ethanone was obtained as an off-white solid having a mp of 168°-170° C.

Quelle